13990868089 has 9 divisors (see below), whose sum is σ = 15379822479. Its totient is φ = 12717788160.

The previous prime is 13990868069. The next prime is 13990868119. The reversal of 13990868089 is 98086809931.

The square root of 13990868089 is 118283.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 13251463225 + 739404864 = 115115^2 + 27192^2 .

It is not a de Polignac number, because 13990868089 - 2⁵ = 13990868057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13990868039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1295737 + ... + 1306489.

Almost surely, 2^13990868089 is an apocalyptic number.

13990868089 is the 118283-rd square number.

13990868089 is the 59142-nd centered octagonal number.

It is an amenable number.

13990868089 is a deficient number, since it is larger than the sum of its proper divisors (1388954390).

13990868089 is an frugal number, since it uses more digits than its factorization.

13990868089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21528 (or 10764 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 61.

The spelling of 13990868089 in words is "thirteen billion, nine hundred ninety million, eight hundred sixty-eight thousand, eighty-nine".